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Any stones of such dimensions that would interfere with <br />• compaction in the layer thicknesses specified or impact performance, <br />as determined by the Engineer, shall be removed from the zone in <br />which they are placed prior to compaction. <br />The Contractor shall maintain and protect fills in a condition <br />satisfactory to the Engineer at all times until the finial completion <br />and acceptance of the work. Any approved fill material which becomes <br />unsuitable for any reason whatsoever, after being placed in the fill <br />and before final acceptance of the work, shall be removed and <br />replaced in a manner satisfactory to the Engineer at the Contractor's <br />expense. <br />6.6 Compaction Equipment <br />6.6.1 General <br />The Contractor shall provide sufficient compaction <br />• ~ equipment of the types and sizes specified herein as is <br />necessary for the various fill materials specified herein. The <br />Contractor will be permitted to use alternative equipment, <br />provided the Contractor can demonstrate to the Engineer that <br />such equipment will adequately compact the fill material to <br />a density not less than that which would be produced by the <br />equipment specified; and that no undesirable features, such <br />as segregation or stratification, will occur with the proposed <br />alternate equipment. If the Contractor wishes to use <br />alternative equipment, he shall submit to the Engineer for <br />approval complete details of the equipment and the methods <br />proposed for its use. The Engineer's approval of the use of <br />alternative equipment will be conditional upon the Contractor's <br />construction of test fills at his own expense. Any approval <br />of alternate equipment will not relieve the Contractor from <br />responsibility of obtaining the specified compaction. <br />n <br />U <br />27 <br />